/**
 * Created by guohongjun on 2018/4/18.
 * 用户相关api
 */
import CryptoJS from 'crypto-js'
/* utf.js - UTF-8 <=> UTF-16 convertion
    *
    * Copyright (C) 1999 Masanao Izumo <iz@onicos.co.jp>
    * Version: 1.0
    * LastModified: Dec 25 1999
    * This library is free. You can redistribute it and/or modify it.
    */
/*
 * Interfaces:
 * utf8 = utf16to8(utf16);
 * utf16 = utf8to16(utf8);
 */
function utf16to8(str) {
  var out, i, len, c
  out = ''
  len = str.length
  for (i = 0; i < len; i++) {
    c = str.charCodeAt(i)
    if ((c >= 0x0001) && (c <= 0x007F)) {
      out += str.charAt(i)
    } else if (c > 0x07FF) {
      out += String.fromCharCode(0xE0 | ((c >> 12) & 0x0F))
      out += String.fromCharCode(0x80 | ((c >> 6) & 0x3F))
      out += String.fromCharCode(0x80 | ((c >> 0) & 0x3F))
    } else {
      out += String.fromCharCode(0xC0 | ((c >> 6) & 0x1F))
      out += String.fromCharCode(0x80 | ((c >> 0) & 0x3F))
    }
  }
  return out
}
// function utf8to16(str) {
//   var out, i, len, c
//   var char2, char3
//   out = ''
//   len = str.length
//   i = 0
//   while (i < len) {
//     c = str.charCodeAt(i++)
//     switch (c >> 4) {
//       case 0:
//       case 1:
//       case 2:
//       case 3:
//       case 4:
//       case 5:
//       case 6:
//       case 7:
//         // 0xxxxxxx
//         out += str.charAt(i - 1)
//         break
//       case 12:
//       case 13:
//         // 110x xxxx 10xx xxxx
//         char2 = str.charCodeAt(i++)
//         out += String.fromCharCode(((c & 0x1F) << 6) | (char2 & 0x3F))
//         break
//       case 14:
//         // 1110 xxxx 10xx xxxx 10xx xxxx
//         char2 = str.charCodeAt(i++)
//         char3 = str.charCodeAt(i++)
//         out += String.fromCharCode(((c & 0x0F) << 12) | ((char2 & 0x3F) << 6) | ((char3 & 0x3F) << 0))
//         break
//     }
//   }
//   return out
// }
var base64EncodeChars = 'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789-_'
// var base64DecodeChars = new Array(-1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63,
//   52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1, -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14,
//   15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1, -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40,
//   41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1)
function base64encode(str) {
  var out, i, len
  var c1, c2, c3
  len = str.length
  i = 0
  out = ''
  while (i < len) {
    c1 = str.charCodeAt(i++) & 0xff
    if (i === len) {
      out += base64EncodeChars.charAt(c1 >> 2)
      out += base64EncodeChars.charAt((c1 & 0x3) << 4)
      out += '=='
      break
    }
    c2 = str.charCodeAt(i++)
    if (i === len) {
      out += base64EncodeChars.charAt(c1 >> 2)
      out += base64EncodeChars.charAt(((c1 & 0x3) << 4) | ((c2 & 0xF0) >> 4))
      out += base64EncodeChars.charAt((c2 & 0xF) << 2)
      out += '='
      break
    }
    c3 = str.charCodeAt(i++)
    out += base64EncodeChars.charAt(c1 >> 2)
    out += base64EncodeChars.charAt(((c1 & 0x3) << 4) | ((c2 & 0xF0) >> 4))
    out += base64EncodeChars.charAt(((c2 & 0xF) << 2) | ((c3 & 0xC0) >> 6))
    out += base64EncodeChars.charAt(c3 & 0x3F)
  }
  return out
}
// function base64decode(str) {
//   var c1, c2, c3, c4
//   var i, len, out
//   len = str.length
//   i = 0
//   out = ''
//   while (i < len) {
//     /* c1 */
//     do {
//       c1 = base64DecodeChars[str.charCodeAt(i++) & 0xff]
//     } while (i < len && c1 === -1)
//     if (c1 === -1) break
//     /* c2 */
//     do {
//       c2 = base64DecodeChars[str.charCodeAt(i++) & 0xff]
//     } while (i < len && c2 === -1)
//     if (c2 === -1) break
//     out += String.fromCharCode((c1 << 2) | ((c2 & 0x30) >> 4))
//     /* c3 */
//     do {
//       c3 = str.charCodeAt(i++) & 0xff
//       if (c3 === 61) return out
//       c3 = base64DecodeChars[c3]
//     } while (i < len && c3 === -1)
//     if (c3 === -1) break
//     out += String.fromCharCode(((c2 & 0XF) << 4) | ((c3 & 0x3C) >> 2))
//     /* c4 */
//     do {
//       c4 = str.charCodeAt(i++) & 0xff
//       if (c4 === 61) return out
//       c4 = base64DecodeChars[c4]
//     } while (i < len && c4 === -1)
//     if (c4 === -1) break
//     out += String.fromCharCode(((c3 & 0x03) << 6) | c4)
//   }
//   return out
// }
var safe64 = function(base64) {
  base64 = base64.replace(/\+/g, '-')
  base64 = base64.replace(/\//g, '_')
  return base64
}
var genUpToken = function(accessKey, secretKey, putPolicy) {
  var put_policy = JSON.stringify(putPolicy)
  var encoded = base64encode(utf16to8(put_policy))
  var hash = CryptoJS.HmacSHA1(encoded, secretKey)
  var encoded_signed = hash.toString(CryptoJS.enc.Base64)
  var upload_token = accessKey + ':' + safe64(encoded_signed) + ':' + encoded
  return upload_token
}
export {
  genUpToken
}

